A general recommendation: To find documentation or help, do a google
search on any of the topics covered in class. For example, "gawk
tutorial" will turn up several useful documents that supplement the
class notes on gawk programming. The examples below under "Resources"
were found this way.

Homework 4: Regular expressions, Awk
If you have a problem with entering odd characters such as tabs
in emacs, use "c-q" before the character. The character "c-q"
acts as a quote for a single character in emacs, like "\" in the
shell. Note that in "tr" and "gawk", tabs are recognized as
"\t".

Emacs initialization file: .emacs
The file contains two keyboard macros that copy the current line
to the other window in 2-window mode:
C-x c --- copies the current line and moves to the next line
C-x v --- copies the current line and stays on the current line
Unfortunately, the first macro bombs if you are at the end of the file
and there is no terminating .